Journal ArticleDOI
Deformation and life analysis of composite flywheel disk systems
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TLDR
In this paper, an analytical model capable of performing an elastic stress analysis for single/multiple, annular/solid, anisotropic/isotropic disk systems, subjected to pressure surface tractions, body forces (in the form of temperature-changes and rotation fields) and interfacial misfits is summarized.Abstract:
In this study an attempt is made to put into perspective the problem of a rotating disk, be it a single disk or a number of concentric disks forming a unit. An analytical model capable of performing an elastic stress analysis for single/multiple, annular/solid, anisotropic/isotropic disk systems, subjected to pressure surface tractions, body forces (in the form of temperature-changes and rotation fields) and interfacial misfits is summarized. Results of an extensive parametric study are presented to clearly define the key design variables and their associated influence. In general the important parameters were identified as misfit, mean radius, thickness, material property and/or load gradation, and speed; all of which must be simultaneously optimized to achieve the ‘best’ and most reliable design. Also, the important issue of defining proper performance/merit indices (based on the specific stored energy), in the presence of multiaxiality and material anisotropy is addressed. These merit indices are then utilized to discuss the difference between flywheels made from PMC and TMC materials with either an annular or solid geometry. Finally two major aspects of failure analysis, that is the static and cyclic limit (burst) speeds are addressed. In the case of static limit loads, a lower (first fracture) bound for disks with constant thickness is presented. The results (interaction diagrams) are displayed graphically in designer friendly format. For the case of fatigue, a representative fatigue/life master curve is illustrated in which the normalized limit speed versus number of applied cycles is given for a cladded TMC disk application.read more
Citations
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Journal ArticleDOI
Robust Energy Management of a Hybrid Wind and Flywheel Energy Storage System Considering Flywheel Power Losses Minimization and Grid-Code Constraints
TL;DR: Comparative simulation studies and hardware-in-the-loop test results validate the effectiveness of the proposed EMS in reducing the FESS losses while respecting the grid integration code constraints.
Journal ArticleDOI
A comparative study between optimal metal and composite rotors for flywheel energy storage systems
Vaishnavi Kale,Marc Secanell +1 more
TL;DR: In this paper, a plain-stress, linear elastic mathematical model of the flywheel rotor described by Krack et al. is used for analysis, and different optimization formulations corresponding to performance indices chosen based on the FESS application are then solved to study optimal FESS designs.
Journal ArticleDOI
Energy Storage Devices in Electrified Railway Systems - A Review
TL;DR: The foremost functionalities of the railway ESSes are presented together with possible solutions proposed from the academic arena and current practice in the railway industry and a comprehensive comparison is presented for various ESS technologies.
Journal ArticleDOI
Deformation and stress analysis of circumferentially fiber-reinforced composite disks
TL;DR: In this article, a semi-analytical method is developed for the analysis of deformation and three-dimensional stress field in rotating annular disks made of cylindrically orthotropic nested rings.
Journal ArticleDOI
The effect of filament winding mosaic pattern on the stress state of filament wound composite flywheel disk
TL;DR: In this article, the authors present results of the finite element modelling and stress analysis of a filament wound spinning composite disk with different types of filament winding mosaic pattern, and the disk has also been modelled and analysed using conventional method and differences in the predicted stress values from both techniques are demonstrated through stress distributions.
References
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Book ChapterDOI
Materials Selection for Mechanical Design
David Cebon,Michael F. Ashby +1 more
TL;DR: The design process engineering materials and their properties materials selection charts materials selection without shape selection of material and shape materials processing and design sources of material property data materials, aesthetics and industrial design forces for change case studies as mentioned in this paper.
Book
Materials Selection in Mechanical Design
Michael F. Ashby,David Cebon +1 more
TL;DR: The design process engineering materials and their properties materials selection charts materials selection without shape selection of material and shape materials processing and design sources of material property data materials, aesthetics and industrial design forces for change case studies.
Journal ArticleDOI
Theory of Elasticity of an Anisotropic Elastic Body
Journal ArticleDOI
Flywheel technology: past, present, and 21st century projections
TL;DR: In this paper, the present status of flywheel energy storage technology, or mechanical batteries, and realistic future projections that are possible based on stronger composite materials and advancing technology are discussed.